Analysis of Pollutant Emissions of three Plug-in Hybrid Electric Vehicles

In order to evaluate real-world energy consumption and tail-pipe emissions of current PHEVs, we tested three PHEVs in different driving conditions. The study also considers measurements of emissions at different ambient temperatures and for different operating conditions of the vehicles. The results show that the battery state-of-charge (SOC) determines the absolute CO2 emissions, as the CO2 emissions decrease with higher electric shares. However, this does not apply for those pollutants discussed in this paper. Furthermore, the results show that at low ambient temperature, cold start emissions have a high influence on the average emissions of the driving cycle. Generally, the average pollutant emissions are less related to the speed or road category than in case of CO2